Quiz 1.4 - Quadratic Review

In the equation
y = x² +5x +7, which Dishaun thinks matches each leading coefficient with its correct letter 

• a=0, b=5, c=7

• a=1, b=5, c=7

• a=7, b=5, c=1

The discriminant is

• aX²  + bX  +  c
• b - 4ac
• b² - 4ac
• b² + 4ac

Tags

CCSS.HSA-REI.B.4B

Solve the quadratic equation for Derrick.
2p² - 2p - 55 = 5

• A .  {3.28, -2.28}

• B .  {2.5, -1.78}

• C . {6, -5}

• D . {-1, 4}

Tags

CCSS.HSA-REI.B.4B

Solve for x.  Round to the nearest hundredth if necessary.
3x² = 16x + 12. This problem was solved by Shyleek in our class, can you find the solution as well?

• x = -.67, 6

• x = -6, .67

• x = 3.33, 18

• x = -3.33, 18

Tags

CCSS.HSA-REI.B.4B

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

What is the equation for axis of symmetry?

• y=3
• x=3
• x=5
• x=1

Tags

CCSS.HSF-IF.C.7A

What causes the graph of y = x² to open downward?

• multiply the x² by a fraction
• multiply the x² by a decimal
• multiply the x² by a negative number
• multiply the x² by a number greater than 1

Kizon is studying quadratic functions and wonders, what is the vertex form of a quadratic function?

• f(x) = 2a(x-h)² + k

• f(x) = a(x-h)² + k

• f(x) = (x+h)² + k

• f(x) = a(x-h) - k

What steps transform the graph y = x² to y = 2(x+2)² - 5, as demonstrated in Amelia's math project?

• shrink by 2, shifted 2 units left and 5 down

• Stretch by 5, shifted 5 units left and 2 down

• Stretch by 2, shifted 2 units left and 5 down

• shrink by 5, shifted 2 units left and 2 down

• (1, 1)

• (-2, 1)

• (-1, -1)

• (-1, 1)